package com.jdy.haoduoai.rx.util.async;

/**
 * Copyright 2014 Netflix, Inc.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import rx.Observable;
import rx.Subscription;

/**
 * An Observable that provides a Subscription interface to signal a stop
 * condition to an asynchronous task.
 * 
 * @see <a
 *      href="https://github.com/ReactiveX/RxJava/wiki/Async-Operators#wiki-runasync">RxJava
 *      Wiki: runAsync()</a>
 */
public class StoppableObservable<T> extends Observable<T> implements
    Subscription {
  private final Subscription token;

  public StoppableObservable(Observable.OnSubscribe<T> onSubscribe,
      Subscription token) {
    super(onSubscribe);
    this.token = token;
  }

  @Override
  public boolean isUnsubscribed() {
    return token.isUnsubscribed();
  }

  @Override
  public void unsubscribe() {
    token.unsubscribe();
  }
}
